9-35089051-A-C

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_032634.4(PIGO):c.*41T>G variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.997 in 1,612,920 control chromosomes in the GnomAD database, including 802,103 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.99 (73974 hom., cov: 31)
  • Exomes 𝑓: 1.0 (728129 hom.)
• Consequence: PIGO NM_032634.4 3_prime_UTR
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:3
• Conservation: PhyloP100: 0.254

Genes affected

PIGO (HGNC:23215): (phosphatidylinositol glycan anchor biosynthesis class O) This gene encodes a protein that is involved in glycosylphosphatidylinositol (GPI)-anchor biosynthesis. The GPI-anchor is a glycolipid which contains three mannose molecules in its core backbone. The GPI-anchor is found on many blood cells and serves to anchor proteins to the cell surface. This protein is involved in the transfer of ethanolaminephosphate (EtNP) to the third mannose in GPI. At least three alternatively spliced transcripts encoding two distinct isoforms have been found for this gene. [provided by RefSeq, Jan 2011]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.93).
• BP6: Variant 9-35089051-A-C is Benign according to our data. Variant chr9-35089051-A-C is described in ClinVar as [Benign]. Clinvar id is 366751.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.994 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PIGO	NM_032634.4	c.*41T>G		3_prime_UTR_variant	11/11	ENST00000378617.4
PIGO	NM_001201484.2	c.*41T>G		3_prime_UTR_variant	13/13
PIGO	NM_152850.4	c.*41T>G		3_prime_UTR_variant	12/12
PIGO	XM_005251619.4	c.*41T>G		3_prime_UTR_variant	11/11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PIGO	ENST00000378617.4	c.*41T>G		3_prime_UTR_variant	11/11	1	NM_032634.4	P1

Frequencies

GnomAD3 genomes AF: 0.986 AC: 149945 AN: 152136 Hom.: 73918 Cov.: 31

Gnomad AFR AF: 0.951

Gnomad AMI AF: 1.00

Gnomad AMR AF: 0.991

Gnomad ASJ AF: 1.00

Gnomad EAS AF: 1.00

Gnomad SAS AF: 1.00

Gnomad FIN AF: 1.00

Gnomad MID AF: 1.00

Gnomad NFE AF: 1.00

Gnomad OTH AF: 0.986

GnomAD3 exomes AF: 0.996 AC: 249629 AN: 250640 Hom.: 124327 AF XY: 0.997 AC XY: 135028 AN XY: 135416

Gnomad AFR exome AF: 0.948

Gnomad AMR exome AF: 0.996

Gnomad ASJ exome AF: 1.00

Gnomad EAS exome AF: 1.00

Gnomad SAS exome AF: 1.00

Gnomad FIN exome AF: 1.00

Gnomad NFE exome AF: 1.00

Gnomad OTH exome AF: 0.998

GnomAD4 exome AF: 0.998 AC: 1458423 AN: 1460666 Hom.: 728129 Cov.: 43 AF XY: 0.999 AC XY: 725642 AN XY: 726616

Gnomad4 AFR exome AF: 0.949

Gnomad4 AMR exome AF: 0.996

Gnomad4 ASJ exome AF: 1.00

Gnomad4 EAS exome AF: 1.00

Gnomad4 SAS exome AF: 1.00

Gnomad4 FIN exome AF: 1.00

Gnomad4 NFE exome AF: 1.00

Gnomad4 OTH exome AF: 0.997

GnomAD4 genome AF: 0.986 AC: 150060 AN: 152254 Hom.: 73974 Cov.: 31 AF XY: 0.986 AC XY: 73390 AN XY: 74422

Gnomad4 AFR AF: 0.951

Gnomad4 AMR AF: 0.991

Gnomad4 ASJ AF: 1.00

Gnomad4 EAS AF: 1.00

Gnomad4 SAS AF: 1.00

Gnomad4 FIN AF: 1.00

Gnomad4 NFE AF: 1.00

Gnomad4 OTH AF: 0.986

Alfa AF: 0.997 Hom.: 69571

Bravo AF: 0.984

Asia WGS AF: 0.996 AC: 3465 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Hyperphosphatasia with intellectual disability syndrome 2 Benign:2

Benign, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Sep 05, 2021	- -
Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

not provided Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

Jun 25, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.93
Cadd	Benign	8.0
Dann	Benign	0.61

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs556766; hg19: chr9-35089048;